Assembly difficulty: easy/medium
Bastl Instrument’s Propust is compact tripple passive filter with with fixed cutoff frequencies for high pass and lowpass stages. It is simple RC filter with 2 stages for HP and one stage for LP. There is a drop in signal loudness. No power connection is required. Simple fixed filters can help you to clean up your final mix and make room for each sound or they can be used for filtering noises and other signals when generating for instance drum sounds. When signal goes thru both HP and LP stage it creates BP.
- triple high pass 2-pole filters (cutoffs are cca 7kHz, 3.5kHz and 220Hz)
- tripple lowpass 1-pole filters (cutoffs are cca (1.5kHz, 4.1kHz and 880Hz)
- passive design > signal drop +no power connection
- 15mm deep
- passive design – no power needed